The Development of Atomic Theory
... new studies are done. Even though no one has ever seen an atom up close we are still able to make new discoveries – just like we have made new discoveries about dinosaurs. ...
... new studies are done. Even though no one has ever seen an atom up close we are still able to make new discoveries – just like we have made new discoveries about dinosaurs. ...
Atoms
... Matter The term matter describes all of the physical substances around us: your table, your body, a pencil, water, and so forth ...
... Matter The term matter describes all of the physical substances around us: your table, your body, a pencil, water, and so forth ...
Early View of the Elements Democritus Metallurgy
... In a chemical change, the total mass of the new substances is always the same as the total mass of the original substances So, all the atoms that went into the reaction come out, but get rearranged into new substances Matter is neither created nor destroyed, but only changes form! ...
... In a chemical change, the total mass of the new substances is always the same as the total mass of the original substances So, all the atoms that went into the reaction come out, but get rearranged into new substances Matter is neither created nor destroyed, but only changes form! ...
document
... number with a decimal – is always the larger number on the periodic table. mass number (A) - sum of the protons and neutrons in a nucleus this number is rounded from atomic mass due to the fact that there are isotopes # neutrons = A - Z rounds to 4 ...
... number with a decimal – is always the larger number on the periodic table. mass number (A) - sum of the protons and neutrons in a nucleus this number is rounded from atomic mass due to the fact that there are isotopes # neutrons = A - Z rounds to 4 ...
Classifying Chemical Reactions 9-3
... Balance the atoms of an element one at a time by adding coefficients (the numbers in front) - save H and O until LAST! Check to make sure it is balanced. ...
... Balance the atoms of an element one at a time by adding coefficients (the numbers in front) - save H and O until LAST! Check to make sure it is balanced. ...
Chapter 2: Chemistry Level
... amounts of heat before changing temperature High heat of vaporization – changing from a liquid to a gas requires large amounts of heat Polar solvent properties – dissolves ionic substances, ...
... amounts of heat before changing temperature High heat of vaporization – changing from a liquid to a gas requires large amounts of heat Polar solvent properties – dissolves ionic substances, ...
Unit 2 (Biochemistry) Review
... You should be able to tell the difference between ions and atoms, and be able to determine what type of ion is present. 3) I can compare the types of bonding between atoms to form molecules. (A.5.c) Ionic Bond Covalent Bond Metallic Bond Charge Valence Electron Oxidation Number You should be able to ...
... You should be able to tell the difference between ions and atoms, and be able to determine what type of ion is present. 3) I can compare the types of bonding between atoms to form molecules. (A.5.c) Ionic Bond Covalent Bond Metallic Bond Charge Valence Electron Oxidation Number You should be able to ...
Science Notes September 09/06/2016
... Dalton expanded into elements classification chart called periodic table with different masses & properties …Everything may be split into atoms (smallest particles) & compounds – combinations of elements JJ Thomson experimented with rays/beams of light to determine - electrons hold negative charge - ...
... Dalton expanded into elements classification chart called periodic table with different masses & properties …Everything may be split into atoms (smallest particles) & compounds – combinations of elements JJ Thomson experimented with rays/beams of light to determine - electrons hold negative charge - ...
Chapter 6 - Section 1-The Chemical Context of Life
... Pt. injected with glucose labeled with radioactive carbon Particles collide with electrons from chemical reactions in the body The PET detects these hot spots” Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... Pt. injected with glucose labeled with radioactive carbon Particles collide with electrons from chemical reactions in the body The PET detects these hot spots” Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Exam 3 Key
... For each of the following, write the word, words, or number in each blank that best completes each sentence. (2 points each) 1. The condition of an atom that has at least one of its electrons in orbitals that do not represent the lowest possible potential energy is called a(n) excited state. 2. A(n ...
... For each of the following, write the word, words, or number in each blank that best completes each sentence. (2 points each) 1. The condition of an atom that has at least one of its electrons in orbitals that do not represent the lowest possible potential energy is called a(n) excited state. 2. A(n ...
AToms
... proved the existence of the nucleus. He shot charged particles at gold foil, most traveled straight through but a few bounced back. He inferred that atoms are mostly empty space. The diameter of the nucleus is 1/10,000 the diameter of the whole atom. ...
... proved the existence of the nucleus. He shot charged particles at gold foil, most traveled straight through but a few bounced back. He inferred that atoms are mostly empty space. The diameter of the nucleus is 1/10,000 the diameter of the whole atom. ...
Chapter 30 Notes - Valdosta State University
... eV, we call this the ground state. This is the lowest energy level possible in a hydrogen atom. If energy is added to the electron, it can occupy a higher energy level until it emits a photon and falls back to a lower energy level. If the electron is given 13.6 eV, it leaves the atom (n = ∞) and a h ...
... eV, we call this the ground state. This is the lowest energy level possible in a hydrogen atom. If energy is added to the electron, it can occupy a higher energy level until it emits a photon and falls back to a lower energy level. If the electron is given 13.6 eV, it leaves the atom (n = ∞) and a h ...
Chapter 3
... • Find the actual moles of each reactant. Use the balanced chem eqn to determine how many mol of R2 is required to react completely with R1. Do you have enough R2? If not, R2 = limiting reactant = LR and R1 = reactant in excess = XS. • Always use the LR to solve the stoichiometric problem to find th ...
... • Find the actual moles of each reactant. Use the balanced chem eqn to determine how many mol of R2 is required to react completely with R1. Do you have enough R2? If not, R2 = limiting reactant = LR and R1 = reactant in excess = XS. • Always use the LR to solve the stoichiometric problem to find th ...
Redox Reactions - Hillsborough County Public Schools
... H is always +1 (except when attached to more electronegative metals, Li, Na, Ca, and Al 7. Group 1A, 2A, and 3A always have an oxidation number equal to the group number (equal to the charge it would have if it were a ion with noble gas configuration.) 8. Sum of all oxidation numbers in a neutra ...
... H is always +1 (except when attached to more electronegative metals, Li, Na, Ca, and Al 7. Group 1A, 2A, and 3A always have an oxidation number equal to the group number (equal to the charge it would have if it were a ion with noble gas configuration.) 8. Sum of all oxidation numbers in a neutra ...
The Atom
... Aristotle believed that you would never have with a particle that could never be cut. He had such a strong social influence on people that everyone believed he was right. ...
... Aristotle believed that you would never have with a particle that could never be cut. He had such a strong social influence on people that everyone believed he was right. ...
Atomic Theory - Princeton High School
... Updating Dalton’s Atomic Theory 3 major differences between modern atomic theory & Dalton’s atomic theory: • Atoms are NOT indivisible – they are made up of protons, neutrons, and electrons • Atoms of the same element are NOT exactly alike – they can have different masses (isotopes) • Atoms CAN be ...
... Updating Dalton’s Atomic Theory 3 major differences between modern atomic theory & Dalton’s atomic theory: • Atoms are NOT indivisible – they are made up of protons, neutrons, and electrons • Atoms of the same element are NOT exactly alike – they can have different masses (isotopes) • Atoms CAN be ...
Unit 2: Atoms, Moles and The Periodic Table Notes (answers)
... In 1912, Ernest Rutherford proposed the Nuclear Model for atoms after his famous gold foil experiment (he shot alpha particles into a piece of gold foil and found that the alpha particles passed through the gold foil – indicating the the atom is made up of mostly empty space). Earlier to this time, ...
... In 1912, Ernest Rutherford proposed the Nuclear Model for atoms after his famous gold foil experiment (he shot alpha particles into a piece of gold foil and found that the alpha particles passed through the gold foil – indicating the the atom is made up of mostly empty space). Earlier to this time, ...
Chapter 6 Powerpoint
... 1) The yellow light given off by a sodium vapor lamp used for public lighting has a wavelength of 589 nm. What is the frequency of this radiation? 2) A laser used in eye surgery to fuse detached retinas produces radiation with a wavelength of 640.0 nm. Calculate the frequency of this radiation. ...
... 1) The yellow light given off by a sodium vapor lamp used for public lighting has a wavelength of 589 nm. What is the frequency of this radiation? 2) A laser used in eye surgery to fuse detached retinas produces radiation with a wavelength of 640.0 nm. Calculate the frequency of this radiation. ...
1 2.1 Atomic Structure and Subatomic Particles (p. 40) There are two
... In 1909, R. A. Millikan, using his oil droplet experiment, determined the unit charge of an electron to be -1.60 x 10-19 C. 2.2 The Nuclear Atom (p. 43) In 1911, Ernest Rutherford, using his “gold foil experiment”, proposed that the atom has a dense, positively charged core which he called the “nucl ...
... In 1909, R. A. Millikan, using his oil droplet experiment, determined the unit charge of an electron to be -1.60 x 10-19 C. 2.2 The Nuclear Atom (p. 43) In 1911, Ernest Rutherford, using his “gold foil experiment”, proposed that the atom has a dense, positively charged core which he called the “nucl ...
Matter - Dwight Public Schools
... Properties of H2O • Hydrogen bonds: Because water is a polar molecule it can form up to 4 hydrogen bonds • This allows water to have certain properties: – Cohesion is the attractive force between molecules of the same substance • This allows water to stick to itself – This is why water beads on a w ...
... Properties of H2O • Hydrogen bonds: Because water is a polar molecule it can form up to 4 hydrogen bonds • This allows water to have certain properties: – Cohesion is the attractive force between molecules of the same substance • This allows water to stick to itself – This is why water beads on a w ...
Elements and the Periodic Table
... • The elements below the lanthanides are called actinides. Many of these elements are so unstable that they last for only a fraction of a second after they are made. ...
... • The elements below the lanthanides are called actinides. Many of these elements are so unstable that they last for only a fraction of a second after they are made. ...
Chapter 4 Spectroscopy
... • Low-density hot gas produces emission spectrum • Continuous spectrum incident on cool, thin gas produces absorption spectrum ...
... • Low-density hot gas produces emission spectrum • Continuous spectrum incident on cool, thin gas produces absorption spectrum ...